Modbus Point Map - GE AMP1B1 Manual

16 A M P 1 B 1 , A M P 1C 2 , A M P 1 C 3 C o m p a c t P o w e r a n d E n e r g y M e t e r

Modbus Point Map

The AMP1C2 Full Data Set (FDS) features data outputs such as
demand calculations, per phase VA and VAR, and VAh VARh
accumulators. The AMP1C3 Data Logging model adds
configuration registers 155-178 and buffer reading at registers
8000-13760. For security reasons, configuration and resets on all
AMP1 models are protected by a user configurable passcode. The
meter supports variable CTs and PTs, allowing a much wider
range of operation from 90V x 5A up to 32000V x 32000A. To
promote this, the meter permits variable scaling of the 16-bit
integer registers via the scale registers. The 32-bit floating point
registers do not need to be scaled.
Integer registers begin at 001 (0x001). Floats at 257 (0x101).
Configuration registers at 129 (0x081). Values not supported in a
particular System Type configuration will report QNAN (0x8000
in Integer Registers, 0x7FC00000 in Floating Point Registers).
Supported Modbus Commands
Note: ID String information varies from model to model. Text
shown here is an example.
Command Description
0x03 Read Holding Registers
0x04 Read Input Registers
0x06 Preset Single Register
0x10 Preset Multiple Registers
Report ID
Return string:
byte0: address byte1: 0x11
byte2: #bytes following w/out crc
byte3: ID byte = 247
0x11
byte4: status = 0xFF if the operating system is used;
status = 0x00 if the reset system is used
bytes5+: ID string = "GE Industrial Solutions AMP1xx Power
Meter Full Data Set" or "GE Industrial Solutions
AMP1xx Power Meter - RESET SYSTEM RUNNING RS
Version x.xxx" last 2 bytes: CRC
Read Device Identification, BASIC implementation
(0x00, 0x01 and 0x02 data), Conformity Level 1
Object values:
0x01: "GE Industrial Solutions" 0x02: "AMP1xx"
0x2B
0x03: "Vxx.yyy", where xx.yyy is the OS version number
(reformatted version of the Modbus register
#7001, (Firmware Version, Operating System)
If register #7001 == 12345, then the 0x03 data would be
"V12.345")
Legend
The following table lists the addresses assigned to each data
point. For floating point format variables, each data point
appears twice because two 16-bit addresses are required to hold
a 32-bit float value.
R=read only; R/W=read from either int or float formats,
R/W
write only to integer format.
Value is stored in non-volatile memory. The value will still be
NV
available if the meter experiences a power loss and reset.
UInt Unsigned 16-bit integer.
SInt Signed 16-bit integer.
Unsigned 32-bit integer; Upper 16-bits (MSR)
ULong in lowest-numbered / first listed register
Format
(001/002 = MSR/LSR).
32-bit floating point; Upper 16-bits (MSR) in lowest
Float numbered / first listed register (257/258 = MSR/LSR).
Encoding is per IEEE standard 754 single precision.
Units
Lists the physical units that a register holds.
Some Integer values must be multiplied by a constant scale
Scale
factor (typically a fraction), to be read correctly. This is done
Factor
to allow integer numbers to represent fractional numbers.
Range Defines the limit of the values that a register can contain.